Tobacco-pipe.



W. M. KEBNAN.

TOBACCO PIPE.

APPLICATION FILED AUG. 23, 1909.

Patented Nov. 8, 1910.

5 I hue/moo b 2 m m z WALTER M. KEENAN, or DENVER, COLORADO.

ronacco-rrrn.

Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed August 23, 1909. Serial No. 514,280.

as will enable others skilled in the art to which it appertains to makeand use the same, reference being had to the accompany? ing drawings,and to the letters and figures of reference marked thereon, which formapart of this specification.

My invention relates to improvements in tobacco pipes, my object beingto supply the tobacco within the bowl of the pipe with air and promotecombustion to a greater extent than can be supplied at the opening atthe top of the pipe bowl. I

I have found by experiment that the formation of nicotin in pipes, islargely, if not entirely, due to imperfect combustion of the tobaccowithin the pipe bowl and results from the smothering, so to speak, ofthe fire, whereby combustion is retarded.

In my improved pipe, I make I'OVlSlOIl for. introducing air below thetop 0 the pipe bowl, whereby oxygen may be supplied to the tobacco forthe purpose of combustion at various points between the top and thebottom of the bowl. In this manner, air is allowed to enter, not only atthe top ofthe bowl, but also at oints below simultaneously, thus makingit practicable to promote combustion to any degree desired. I find bythis construction of pipe, that the de osit of nicotin within the stemand bowl 0 the ipe may be practically prevented; in fact it seems thatthe generation, or production of nicotin is obviated by the completecombustion, to which the tobacco is subjected.

In the specific construction disclosed in the drawing, forming a part ofthis appli-' cation, the pipe bowl is provided with a numberofperforations which are inclined downwardly from their outer extremities,thus preventing the possibility of the escape of the tobacco through thesaid ports or perforations, when the pipe is held in the proper ositionfor smoking. I have also shown t ese perforations, ducts or portsprovided with a metal lining consisting of small sleeves or tubes whichare introduced into the said perforations and upset at their 'op positeextremities; that is to say on the inner and outside surfaces of the ipebowl, where-v by they, are retained in p ace. lining for theperforations, or ducts, pre' vents the burning of the bowl where theperforations are located, where thebowl is composed of wood, and alsofacilitates the work-of cleaning 'outthe perforations.

This I. ietal I Having briefly outlined my improved construction, I willproceed to describe the same.

in detail, reference being made to. the accompanying drawing, in whichis illustrated an embodiment thereof.

In this drawing: Figure 1 is a side elevation of a pipe equippedwith myimprovement. Fig. 2 is a top plan view of the same. Flg. 3 1s avertical, longitudinal section taken through the plpe on the line 3-3,Fig.

2. Fig. 4 is a section of the pipe bowl, taken on the line 44, Fig. 2.Fig. 5 is a section similar to Fig. 4, showing a modified form ofconstruction. I

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the bowl; 6 the stem and 7 the mouthpiece ofthe pipe. The bowl is provided below-the top with a number of ducts 8,which are inclined downwardly from their outer extremities, whichprevents the tobacco and ashes from sifting through the ducts. Three ofthese ducts are illustrated, but it must be'understood that any desirednumber may be employed. Each duct is provided with a metal lining 9,

which may consist of a tube inserted in the duct and. upset at itsopposite extremities on the inner and outer surfaces of the .bowl, bythe use of a suitable tool not shown.

In the form of construction shown in Fig. 5, the bowl is surrounded by aband 10, preferably composed of'metal and having a perforation 12,adapted to register with one of the ducts 8, preferablythe'centrally-located duct, or that intermediate the up er and lowerducts of the bowl. This band is adjustable rotatively upon the bowl, andmakes it practicable to close. one of the per forations, if desired,thus reducing the draft or the introduction of air to thetobaccocontained in the pipe bowl. This feature simply illustratestheidea of controllingthe delivery ofv oxygen to the tobacco, sincedifferent qualities or" kinds of tobacco, or other material, which itmay be desired to smoke, may require different quantities of air oroxygen,

therefore evident that provision may be loo made for; closing one ormore of the other ducts of the bowl; I

. In order to support the band or ring 10, upon the pipe bowl, thelatter is shown provided with a circumferential shoulder or rib 13,which is engaged by the lower edge of v the said band.

In further explanation of the use of my improved pipe, and the resultsobtained.

thereby, it may be stated that the nicotin appears to be instantlyconsumed oncontact with the fire and not precipitated asa viscons andsemifluid substance in the bowl or other parts of the pipe; in otherwords, the

nicotin element or part of the tobacco appears to be consumed before itsdeposition or formation. The introduction of air through the ducts orperforations of the pipe bowl produces a moreeven and perfect combustionand prevents the customary increase of accumulation of nicotin below thezone of the fire, avoiding the simmerlng and stewing, so to speak, ofthe released nicotin with the remaining contents of the pipe,

and the resulting rank odors.

By reason of the admission of cold air through the lateral openings orducts in the bowl of the pipe, theheat of the bowl is reduced to aminimum, thus rendering the smoke c001 and preventing burning of thetongue, as well as under secretion of. saliva.

The circulation of fresh, cool air 1n the 1 tobacco contents of the pipethrough the lateral openings or ducts below the zone of the fire, keepsthe tobacco cool and prevents the artial combustion and commingling ofthe fbeneficent tobacco odors, and the acrid and rank qualities beforethey are reached ow the to and having a perforation adapted to registerwith the outer extremity of the pipe-bowl perforation the latter havinga metal lining whose inner extremity is upset .to prevent burning thebowl adjacent the perforation, for the purpose set forth.

2. A pipewhose bowl is provided with erfor'ations for the introductionof :air beow. the top thereof, the said perforations being inclineddownwardly as they extendupset at the op osite extremities-of theperforations, for t e purpose set forth.

3. A perforations for the-introductionofair below the top thereof,thegsaid perforations pipe whose bowl. is provided with inwardly, andprovided with metal linings being-inclined downwardly as theyextendinwardly, a circumferential metal band-adjustably mounted on thebowl, the said band having a perforation adapted to register with theouter extremities of the perforations, and 'a oircumferentia flangeintegral with the pipe bowl for sup orting 4. A pipe whose bowl isrovided with relatively steep downwardlymclined perfo-' pi e bowl thesaid band, substantially as descri ed. 1

rations from the exterior surface of the bowl for the purpose ofintroducing air be low the top thereof, the said perforations bein"metal lined, the inner extremities of the lining being upset to preventthe burning of the bowl adjacent the perforations,

substantially as described.

5. A pipe-whose bowl is provided with a relatively steep, downwardlyinclined perforation from the exterior surface of the bowl to the innersurface thereof, whereby air be introduced into the bowl of the pipe andthe contents of the latter prevented from sifting I through theperforation, substan? tially as descrlbed.

6. A pipe whose bowl is provided with perforatlons having metal liningsupset at their inner extremities, vto preventtheburning of thebowladjacent the perforations, substantially as described.

-, 7. A pi e-whos'e bowl is provided wial ower an mdownward inclineduper, 7 termediate perforations or introducing air into-the bowl of thepipe the said perforations being relatively steep, for the purpose setforth.

In testimony whereof I afiix my signature in'presence of two witnesses.

' WALTER M. KEENAN.

Witnesses:

A. J. OBRIEN',

J nssre F. HOBART.

It is hereby certified that in Letters Petent No. 975,251, grantedNovember 8,

1910,'upon the application of Walter Keenan, of Denver, Colorado, for animprovement in Tobacco-Pipes, an errorappears in the printedspecification requiring correction as follows: Page 2 line 31, the wordunder should read undue; and that the said Letters Patent should be readwith this correction therein that the some may conform to the record ofthe case in the Patent Oflice.

Signed and sealed this 17th day of J anunry, A. 1)., 1911.

[sun] C. C. BILLINGS,

Acting Commissioner of Patents.

